Attachment A - XGH-TS-20-0002-R00 Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nes.pdf

XGH-TS-20-0002-R00

Specification for Procurement of

Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

Author(s)

Ian Turnbull

Steve Kuhn

Date Published:

6/1/2026

Prepared by

OAK RIDGE NATIONAL LABORATORY

Oak Ridge, TN 37831-6283 managed by

UT-BATTELLE, LLC

for the

US DEPARTMENT OF ENERGY

under contract DE-AC05-00OR22725

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

iii

CONTENTS

Contents

CONTENTS ................................................................................................................................................. iii

1. Approvals

2. Introduction

3. Scope

4. Part Specifications

4.1 Non-depolarizing Supermirror Ni/Ti

4.2 Polarizing Supermirror Fe/Si

4.3 Neutron Absorbing

5. Testing

6. Lead Time

7. Documentation

7.1 Drawings

7.2 Material Certifications

7.3 Inspections and Test Results

7.4 Shipping Plan

Specification for Procurement of Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

1. APPROVALS

Rev 00 Rev 01 Rev 02 Rev 03

Approvals

Responsible Engineer

Scientist

Approver

Approver

Revision Description of Changes

0 Initial Release per CG4B-DCN-00-0002

Stephen Kuhn (kuhnsj@ornl.gov) Signature

Lowell Crow (CROWMLJR@ORNL.GOV) Signature

Thomas Huegle (hueglet@ornl.gov) Signature

Ian Turnbull (turnbullis@ornl.gov) Signature

Specification for Procurement of Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

2. INTRODUCTION

ORNL is developing nested mirror optics (NMOs) to act as corrective lenses for neutron scattering instruments at both pulsed and reactor neutron sources. Nested mirror optics deliver a full optics system in a device the size of a shoebox, which means they can be easily exchanged based on the current need of an instrument. This will greatly improve the signal-to-background ratios for neutron scattering, especially for experiments involving new materials or biological samples that can only be prepared in small quantities and where samples are in constrained environments such as pressure cells or high magnetic fields. The nested mirror optics consist of several individual, neutron mirror segments mounted in a frame that holds each mirror in a specific orientation. Polarizing supermirrors will be used in same manner to reflect one neutron spin state but transmit the other spin state as well as creating focusing neutron spin filters. Silicon wafers substrates with a neutron absorbing coating are used in a frame to provide collimation of the neutron beam downstream of the NMO.

3. SCOPE

Herein, the term “Seller” shall refer to the parties responsible for providing neutron mirrors and substrates within the scope defined in this specification, and “Company” shall refer to UT-Battelle, LLC, and its representatives. This specification establishes the requirements for Seller materials of construction, fabrication, inspection, testing, delivery, and final Company acceptance of the neutron mirrors and substrates. The neutron mirrors and substrates shall be manufactured for use at the Spallation Neutron Source (SNS) and the High Flux Isotope Reactor (HFIR) facilities at the Department of Energy’s Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee, USA. The Seller shall manufacture, inspect, test, package, and ship the neutron mirrors and substrates in accordance with all requirements in this specification.

Any exceptions to this specification shall be clearly noted as such in the Seller’s proposal documentation.

Where the Seller takes exceptions, the Seller shall propose alternatives

Specification for Procurement of Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

4. PART SPECIFICATIONS

The parts provided by the Seller are listed below. All parts shall be fabricated by one Seller to maintain consistency in part quality.

4.1 Non-depolarizing Supermirror Ni/Ti

• Substrate:

o Material: Si wafer o Thickness: 0.2mm ±10 µm

• Coating:

o Ni/Ti, o m = 4.0, o Rave = 80%, o Only one side shall be coated o On the side that is coated, a 2mm long strip along the edges in the length direction shall remain uncoated.

• Sizes and Quantities

Item Length (mm) Width (mm) Quantity

1 15 34 60

2 20 34 50

3 60 34 40

4 70 34 40

5 110 34 40

6 60 54 45

4.2 Polarizing Supermirror Fe/Si

• Substrate:

o Material: Si wafer o Thickness: 0.2mm ±10 µm

• Coating:

o Fe/Ti, o m = 3.0, o Rave = 89%, o Only one side shall be coated o On the side that is coated, a 2mm long strip along the edges in the length direction shall remain uncoated.

Specification for Procurement of Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

• Sizes and Quantities

Item Length (mm) Width (mm) Quantity

7 60 34 50

8 60 54 50

4.3 Neutron Absorbing

• Substrate:

o Material: Si wafer o Thickness: 0.2mm ±10 µm

• Coating:

o Material: Gd o Thickness: 4 µm o Only one side shall be coated o On the side that is coated, a 2mm long strip along the edges in the length direction shall remain uncoated.

• Sizes and Quantities

Item Length (mm) Width (mm) Quantity

9 20 54 50

10 30 54 50

11 40 54 50

5. TESTING

The seller shall test the neutron mirrors (items 4.1 & 4.2) with neutrons to verify the quality and performance of the neutron mirror coating.

6. LEAD TIME

The lead time (from awarding of the contract to delivery) shall not exceed 3 months.

7. DOCUMENTATION

Wherever feasible, all documentation shall be submitted in an electronic format to the TPO via email unless otherwise instructed by the TPO. Adobe Portable Document Format (PDF) has been listed as an acceptable format for all documents, including drawings that would normally be printed on paper.

Alternative formats shall be approved by the TPO.

Specification for Procurement of Polarizing and Non-polarizing Neutron Mirrors and Wafers Coated with Neutron Absorbers for Nested Mirror Optics

All documentation submitted to the Company shall be in English. Translated versions of original documents signed by the personnel responsible are acceptable.

7.1 Drawings

The Seller shall submit detail design drawings for the neutron mirrors and substrate to the Company prior to fabrication. The drawing submittal shall be sufficient to support re-fabrication (exact replacement).

7.2 Material Certifications

The Seller shall submit material certifications for the Si wafer substrates to the Company prior to shipping.

7.3 Inspections and Test Results

The Seller shall submit test results (from evaluations described in Section 5) to the Company prior to shipping.

All inspections, tests or examination reports shall contain the following information, as a minimum:

• Unique report number

• Job title

• Inspection date

• Equipment identification

• Specific inspection, or examination, including procedure designation

• Identification of measuring and test equipment used and their latest calibration dates

• Inspection results

• Actions taken because of any discrepancies noted during the inspection

• Signature or initials of the person performing the inspection or examination and their qualifications, and the signature or initials of the person witnessing the test.

7.4 Shipping Plan

The Seller shall create a shipping plan that describes how the neutron mirrors and substrates will be packaged and shipped. This plan shall be submitted to and approved by the Company prior to shipping.